Search results for " hydrochar"

showing 2 items of 2 documents

Mechanisms of Water Interaction with Pore Systems of Hydrochar and Pyrochar from Poplar Forestry Waste

2014

The aim of this study was to understand the water-surface interactions of two chars obtained by gasification (pyrochar) and hydrothermal carbonization (hydrochar) of a poplar biomass. The two samples revealed different chemical compositions as evidenced by solid state (13)C NMR spectroscopy. In fact, hydrochar resulted in a lignin-like material still containing oxygenated functionalities. Pyrochar was a polyaromatic system in which no heteronuclei were detected. After saturation with water, hydrochar and pyrochar were analyzed by fast field cycling (FFC) NMR relaxometry. Results showed that water movement in hydrochar was mainly confined in very small pores. Conversely, water movement in py…

Magnetic Resonance SpectroscopyWater flowSettore AGR/13 - Chimica Agraria1600 General Chemistry1100 General Agricultural and Biological SciencesHydrothermal carbonizationAdsorptionBiocharmedicine910 Geography & travelPorosityWaste ProductsChemistryTemperatureWaterForestryGeneral Chemistry10122 Institute of GeographyPopulusAgronomyChemical engineeringCharcoalGeneral Agricultural and Biological SciencesPorous mediumSaturation (chemistry)Porosityfast field cycling NMR relaxometry hydrochar pyrochar biochar water dynamicsActivated carbonmedicine.drug
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The unnoticed northward expansion of Najas marina subsp. armata (Hydrocharitaceae) in the Mediterranean area: an effect of climate change?

2022

Recent reports of Najas marina L. (Hydrocharitaceae) from Sicily have been interpreted as a confirmation of its presence on the island, where it was earlier mentioned in the 1800s. However the recent finds do not represent “N. marina” (currently N. major All.) but N. marina subsp. armata Horn (= N. delilei Rouy), a different taxon, previously not recorded from Sicily. According to those reports and several new finds presented here, it appears to be invading reservoirs and lakes in southern Sicily and seems to be naturally expanding its range. Climate change is suggested as possible cause of this shift. The same trend appears to be taking place across the whole N Mediterranean area, from Por…

Settore BIO/02 - Botanica SistematicaSettore BIO/03 - Botanica Ambientale E Applicataaquatic flora climate change European flora Hydrocharitaceae lakes Mediterranean flora Najas Najas delilei Najas major Najas marina range expansion reservoirs SicilyPlant ScienceEcology Evolution Behavior and SystematicsWilldenowia
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